U.S. Geological Survey 2005 20160315 map Reston, Virginia U.S. Geological Survey https://mrdata.usgs.gov/mrds/ Mineral resource occurrence data covering the world, most thoroughly within the U.S. This database contains the records previously provided in the Mineral Resource Data System (MRDS) of USGS and the Mineral Availability System/Mineral Industry Locator System (MAS/MILS) originated in the U.S. Bureau of Mines, which is now part of USGS. The MRDS is a large and complex relational database developed over several decades by hundreds of researchers and reporters. While database records describe mineral resources worldwide, the compilation of information was intended to cover the United States completely, and its coverage of resources in other countries is incomplete. The content of MRDS records was drawn from reports previously published or made available to USGS researchers. Some of those original source materials are no longer available. The information contained in MRDS was intended to reflect the reports used as sources and is current only as of the date of those source reports. Consequently MRDS does not reflect up-to-date changes to the operating status of mines, ownership, land status, production figures and estimates of reserves and resources, or the nature, size, and extent of workings. Information on the geological characteristics of the mineral resource are likely to remain correct, but aspects involving human activity are likely to be out of date. This digest of the complex mineral resources database is intended for use as reference material supporting mineral resource and environmental assessments on local to regional scale worldwide. Current status: As of 2011, USGS has ceased systematic updates to MRDS, and is working to create a new database, focused primarily on the conterminous US. For locations outside the United States, MRDS remains the best collection of reports that USGS has available. For locations in Alaska, the Alaska Resource Data File remains the most coherent collection of such reports and is in continuing development. A small number of records (about 600) were updated slightly to support USGS studies in the western U.S. related to a land use change proposed by the Bureau of Land Management. 20160315 Date when information was extracted from the main database. Complete None planned -111.042 -104.05668 44.99933 40.99858 Alexandria Digital Library Feature Type Thesaurus mine sites mineral deposit areas ISO 19115 Topic Category geoscientificInformation General glossary for mineral resources spatial data columnar text DBF file geodatabase (ESRI) HTML table KML OGC WFS OGC WMS personal geodatabase (ESRI) shapefile USGS Thesaurus economic geology geospatial datasets map interfaces mineral resources web map services Common geographic areas fAF = Afghanistan fLD50 = Africa fUS01 = Alabama fUS02 = Alaska fAL = Albania fAG = Algeria fAO = Angola fAY = Antarctica fAC = Antigua and Barbuda fAR = Argentina fUS04 = Arizona fUS05 = Arkansas fAM = Armenia fLD70 = Asia fLD80 = Asia Minor and Middle East fAS = Australia fLD60 = Australia and New Zealand fAU = Austria fAJ = Azerbaijan fBF = Bahamas, the fBA = Bahrain fBG = Bangladesh fBB = Barbados fBO = Belarus fBE = Belgium fBH = Belize fBN = Benin fBL = Bolivia fBK = Bosnia and Herzegovina fBC = Botswana fBR = Brazil fVI = British Virgin Islands fBU = Bulgaria fUV = Burkina Faso fBM = Burma fBY = Burundi fUS06 = California fCB = Cambodia fCM = Cameroon fCA = Canada fCJ = Cayman Islands fLD20 = Central America fCI = Chile fCH = China fKT = Christmas Island fCO = Colombia fUS08 = Colorado fCF = Congo fCG = Congo (Democratic Republic of the) fUS09 = Connecticut fCS = Costa Rica fIV = Cote D'Ivoire fHR = Croatia fCU = Cuba fCY = Cyprus fEZ = Czech Republic fUS10 = Delaware fDA = Denmark fUS11 = District of Columbia fDO = Dominica fDR = Dominican Republic fEC = Ecuador fEG = Egypt fES = El Salvador fER = Eritrea fEN = Estonia fET = Ethiopia fLD40 = Europe fFJ = Fiji fFI = Finland fUS12 = Florida fFR = France fFG = French Guiana fGB = Gabon fGA = Gambia, The fGG = Georgia fUS13 = Georgia fGM = Germany fGH = Ghana fGR = Greece fGL = Greenland fGP = Guadeloupe fGT = Guatemala fGV = Guinea fGY = Guyana fHA = Haiti fUS15 = Hawaii fHO = Honduras fHU = Hungary fUS16 = Idaho fUS17 = Illinois fIN = India fUS18 = Indiana fID = Indonesia fUS19 = Iowa fIR = Iran fIZ = Iraq fEI = Ireland fIS = Israel fIT = Italy fJM = Jamaica fJA = Japan fJE = Jersey fJO = Jordan fUS20 = Kansas fKZ = Kazakhstan fUS21 = Kentucky fKE = Kenya fKN = Korea, Democratic People's Republic of fKS = Korea, Republic of fKG = Kyrgyzstan fLA = Laos fLE = Lebanon fLT = Lesotho fLI = Liberia fLY = Libya fLH = Lithuania fUS22 = Louisiana fLU = Luxembourg fMK = Macedonia fMA = Madagascar fUS23 = Maine fMI = Malawi fMY = Malaysia fML = Mali fMB = Martinique fUS24 = Maryland fUS25 = Massachusetts fMR = Mauritania fMX = Mexico fUS26 = Michigan fUS27 = Minnesota fUS28 = Mississippi fUS29 = Missouri fMG = Mongolia fUS30 = Montana fMH = Montserrat fMO = Morocco fMZ = Mozambique fWA = Namibia fNR = Nauru fUS31 = Nebraska fNP = Nepal fNL = Netherlands fNT = Netherlands Antilles fUS32 = Nevada fNC = New Caledonia fUS33 = New Hampshire fUS34 = New Jersey fUS35 = New Mexico fUS36 = New York fNZ = New Zealand fNU = Nicaragua fNG = Niger fNI = Nigeria fLD10 = North America fUS37 = North Carolina fUS38 = North Dakota fNO = Norway fUS39 = Ohio fUS40 = Oklahoma fMU = Oman fUS41 = Oregon fPK = Pakistan fPM = Panama fPP = Papua New Guinea fPA = Paraguay fUS42 = Pennsylvania fPE = Peru fRP = Philippines fPL = Poland fPO = Portugal fUS72 = Puerto Rico fUS44 = Rhode Island fRO = Romania fRS = Russia fRW = Rwanda fSA = Saudi Arabia fSG = Senegal fSL = Sierra Leone fLO = Slovakia fSI = Slovenia fBP = Solomon Islands fSO = Somalia fSF = South Africa fLD30 = South America fUS45 = South Carolina fUS46 = South Dakota fLD90 = Southeast Asia fSP = Spain fCE = Sri Lanka fSC = St. Kitts and Nevis fST = St. Lucia fSU = Sudan fNS = Suriname fWZ = Swaziland fSW = Sweden fSZ = Switzerland fSY = Syria fTI = Tajikistan fTZ = Tanzania fUS47 = Tennessee fUS48 = Texas fTH = Thailand fTO = Togo fTS = Tunisia fTU = Turkey fTX = Turkmenistan fUG = Uganda fUP = Ukraine fAE = United Arab Emirates fUK = United Kingdom fUS = United States fUY = Uruguay fUS49 = Utah fUZ = Uzbekistan fNH = Vanuatu fVE = Venezuela fUS50 = Vermont fVM = Vietnam fUS51 = Virginia fUS78 = Virgin Islands of the United States fUS53 = Washington fWE = West Bank fWI = Western Sahara fUS54 = West Virginia fUS55 = Wisconsin fUS56 = Wyoming fZA = Zambia fZI = Zimbabwe Common Geographic Areas fUS56 none none Peter N Schweitzer USGS Geology, Energy, and Minerals Science Center Geologist mailing address

12201 Sunrise Valley Drive

Reston VA 20192-0002 USA 703-648-6533 703-648-6252 pschweitzer@usgs.gov Hundreds of people have contributed to the development of MRDS and MAS/MILS over several decades. The present digest owes much of its coherence to Bill Ferguson, Bruce Lipin, and Paul Schruben of USGS. Collected over many decades, this information is highly variable in quality. Currency of individual records is variable as well, so it is likely that some information will be found to be out of date. This is a subject of continuing refinement by the USGS and its cooperators. Collected and reported by numerous diverse people, the descriptions provided are not highly consistent in structure or terminology. Recent revision of the MRDS database has begun to address this issue, and the present database digest contains fields chosen for their general consistency, though much work remains to be done. The database is generally sparse; many records have no information for a given field. A few fields required for proper processing are complete throughout. The number of records lacking data in each field is shown in the list below with the percent of records lacking data for that field: >Field Missing values >Label Number Percent >----------------------------------- >DEP_ID 0 0.0 >MRDS_ID 149235 49.0 >MAS_ID 110652 36.4 >SITE_NAME 0 0.0 >LATITUDE 4033 1.3 >LONGITUDE 4033 1.3 >REGION 58555 19.2 >COUNTRY 58555 19.2 >STATE 58762 19.3 >COUNTY 65215 21.4 >DISTRICT 254769 83.7 >ADMIN 299777 98.5 >LAND_STAT 114367 37.6 >COM_TYPE 34 0.0 >COMMOD1 22335 7.3 >COMMOD2 285184 93.7 >COMMOD3 239278 78.6 >OPER_TYPE 0 0.0 >DEP_TYPE 269516 88.6 >PROD_SIZE 194976 64.1 >DEV_STAT 0 0.0 >ORE 236479 77.7 >GANGUE 272740 89.6 >OTHER_MATL 294207 96.7 >OREBODY_FM 264927 87.1 >WORK_TYPE 238249 78.3 >MODEL 292387 96.1 >ALTERATION 289757 95.2 >CONC_PROC 293637 96.5 >PREV_NAME 241287 79.3 >ORE_CTRL 279810 91.9 >REPORTER 36 0.0 >HROCK_UNIT 268180 88.1 >HROCK_CODE 236050 77.6 >AROCK_UNIT 291593 95.8 >AROCK_CODE 278263 91.4 >STRUCTURE 280348 92.1 >TECTONIC 285058 93.7 >REF 25211 8.3 Positional information is highly variable. In the best cases this information was provided by plotting the location on a 7.5 minute topographic map, however many records were located on the basis of published reports containing imprecise or scant information on the specific geographic location. Approximately 4000 records have no reliable geographic coordinates, although about 114 of those have other locational information systematic enough to warrant placement within the controlled vocabulary used to select data for analysis on the web. George T. Mason, Jr. Raymond E. Arndt 1996 1 U.S. Geological Survey Digital Data Series DDS-20 Reston, VA U.S. Geological Survey CD-ROM 1968 1998 Period in which information was added to the MRDS. DDS-20 Previous publication of the MRDS data McFaul, Edward J. Mason, George T. Ferguson, William B. Lipin, Bruce R. 2000 U.S. Geological Survey Digital Data Series DDS-52 Reston, Virginia U.S. Geological Survey ISBN: 0607940212 https://store.usgs.gov/ CD-ROM 2000 publication date DDS-52 Previously published versions of MRDS and MAS/MILS U.S. Geological Survey 2005 relational database for internal development and refinement digital files 1996 2005 Period during which the data were migrated from the original databases to the Oracle RDBMS. Internal RDBMS This version of the database is the source for the current digest. Conversion of MRDS and MAS/MILS for use as a combined minerals database within the Oracle relational database management system proceeded under the general supervision of Bruce Lipin of USGS. Review of many database fields resulted in significant simplification, harmonization among records within these databases and between the databases, and elimination of duplicate records. The resulting relational database is currently maintained by William Ferguson under the supervision of Paul Schruben. This transition occurred from approximately 1996 through 2004. withheld 2004 withheld Paul G Schruben USGS ER GD mailing address

12201 Sunrise Valley Drive

Reston VA 20192-0002 USA 703-648-6142 703-648-6383 pschrube@usgs.gov Select fields and tables from the Oracle RDBMS are extracted using the script pull.php to produce local copies of the tables containing only those fields needed to produce the current digest. The script combine.php draws data from these local tables to create a single monolithic table with one row per mineral resource record. At this writing a number of corrections are made to the data given for the form of orebodies. These changes include the elimination of the useless value "SEE DEPOSIT DESCRIPTION COMMENTS", the elimination of empty parentheses from most records, replacement of the abbreviation 'IRREG' with the more common complete value 'IRREGULAR', and especially a complex analysis of most values originating in the MAS/MILS database. These changes are described by the script orebody-fix.php. Additional modifications are made to the geographic locations of about 4300 records whose coordinates are given in the source database as the South Pole. These coordinates are replaced with NULL values in the current database. The data selection software in the current distribution web site allows some of these records to be retrieved because some of the records contained additional information linking them to specific geographic areas. These changes are carried out by the script place-fix.php. Information about host rocks and associated rocks was subject to additional correction using the SQL statements in fix-rock.php. This table is used to create the GIS shapefiles and other formats available for download. withheld 2005 Peter N Schweitzer U.S. Geological Survey, ER Geologist mailing address

Mail Stop 954 12201 Sunrise Valley Drive

Reston VA 20192 USA 703-648-6533 703-648-6252 pschweitzer@usgs.gov A small number of records (about 560) were updated to reflect work in and around the area of concern from the Wyoming Land Conservation Initiative. The records in question were added, deleted, or modified by Anna Wilson of USGS. 20160107 Deleted 10096613; Updated 10133306, 10206596, 10230343, 10305546 Five more records ere changed to reflect work in and around the area of concern from the Wyoming Land Conservation Initiative. The records in question were added, deleted, or modified by Anna Wilson of USGS. 20160127 Deleted 75 records, updated 1090 records The records in question were added, deleted, or modified by Anna Wilson of USGS. Updated record 10303371 at the request of the site owner. 20160129 Deleted 2 records, updated 4 records Deleted 10036970 and 10249686; these were geochemical observations, not actual mineral resource reports. Modified 10080767, 10090610, 10169488, and 10230223 to improve geographic location, references, and a few comments. The records in question were deleted, or modified by Anna Wilson of USGS. 20160315 Updated plss_coordinates in 10294773, replacing section 25 with south half of section 29, after examining figure 7 of the reference, U.S. Bureau of Mines MLA 44-88. 20170321 Point Simple FALSE 0 TRUE FALSE 0.0001 0.0001 decimal degrees World Geodetic System 1984 WGS 84 6378137 298.257 mrds.dbf Mineral resource records USGS Feature Class 0 OBJECTID OBJECTID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Shape Geometry 0 0 0 Feature geometry. Esri Coordinates defining the features. DEP_ID Deposit identification number. A unique 12-digit system generated sequence number which references records of information pertaining to a mineral property. Textual values of no more than 12 characters. this dataset @@ dep_id String 12 0 0 url url String 60 0 0 MRDS_ID MRDS identification number. Identification number used to refer to this entry in the Mineral Resources Data System, if the record appeared in that database. Textual values of no more than 7 characters. this dataset (no value) Information not available for this record. 149235 records have no value for MRDS_ID. this dataset mrds_id String 7 0 0 MAS_ID MAS/MILS identification number. Identification number for this site as it appeared in the Mineral Availability System/Mineral Industry Locator System database,. Textual values of no more than 10 characters. this dataset (no value) Information not available for this record. 110652 records have no value for MAS_ID. this dataset mas_id String 10 0 0 SITE_NAME Name of the site, deposit, or operation. Current (preferred) form of the name of the site, deposit, or operation to which the record refers. Textual values of no more than 70 characters. this dataset @@ site_name String 70 0 0 LATITUDE Latitude. Geographic latitude of the site, WGS84 if needed). Real numbers stored in double precision. this dataset (no value) Information not available for this record. 4033 records have no value for LATITUDE. this dataset -76.6667 80 decimal degrees latitude Double 8 0 0 LONGITUDE Longitude. Geographic longitude of the site, WGS84 if needed). Real numbers stored in double precision. this dataset (no value) Information not available for this record. 4033 records have no value for LONGITUDE. this dataset -178.8167 179.54917 decimal degrees longitude Double 8 0 0 REGION Geographic region. Code indicating the geographic region. Textual values of no more than 2 characters. this dataset (no value) Information not available for this record. 58555 records have no value for REGION. this dataset region String 2 0 0 COUNTRY Country name. Name of the country in which the site is located. Textual values of no more than 20 characters. this dataset (no value) Information not available for this record. 58555 records have no value for COUNTRY. this dataset country String 32 0 0 STATE State name. Name of the state or province in which the site is located. Textual values of no more than 32 characters. this dataset (no value) Information not available for this record. 58762 records have no value for STATE. this dataset state String 53 0 0 COUNTY County name. Name of the county in which the site is located. Textual values of no more than 96 characters. this dataset (no value) Information not available for this record. 65215 records have no value for COUNTY. this dataset county String 40 0 0 COM_TYPE Commodity type. Type of commodities present: metallic (M), non-metallic (N), or both (B). Textual values of no more than 1 characters. this dataset M Metallic commodity this dataset N Non-metallic commodity this dataset B Commodity used in metallic and non-metallic forms this dataset (no value) Information not available for this record. 34 records have no value for COM_TYPE. this dataset com_type String 1 0 0 COMMOD1 Primary commodities. Guidance given to database editors is to include in this category commodities that have a strong effect on the economics of the project, and might be economically viable as the only commodity. Primary commodities present, a comma-separated list. Commodity qualifiers follow each commodity, delimited by a hyphen. Textual values of no more than 128 characters. this dataset (no value) Information not available for this record. 22335 records have no value for COMMOD1. this dataset commod1 String 125 0 0 COMMOD2 Secondary commodities. Guidance given to database editors is to include commodities that can be economically recovered but have little effect on the economic viability of the project. Secondary commodities present, a comma-separated list. Commodity qualifiers follow each commodity, delimited by a hyphen. Textual values of no more than 128 characters. this dataset (no value) Information not available for this record. 285184 records have no value for COMMOD2. this dataset commod2 String 129 0 0 COMMOD3 Tertiary commodities. Guidance given to database editors is to list commodities that are economically interesting but not economically recoverable as of the date of the source information. Tertiary commodities present, a comma-separated list. Commodity qualifiers follow each commodity, delimited by a hyphen. Textual values of no more than 128 characters. this dataset (no value) Information not available for this record. 239278 records have no value for COMMOD3. this dataset commod3 String 161 0 0 OPER_TYPE Operation type. Type of operation existing or proposed at the site. Textual values of no more than 30 characters. this dataset Surface Open-pit or open-cast mine in which the overburden is completely removed and the sides of the mine are typically terraced away from the center. The overburden and ore are usually transported out of the pit in trucks. Includes quarry operations which are often open at the front as well, and strip mines which are open at both ends. this dataset Underground The opening to the mine is small relative to the size of the workings. The opening is usually called a shaft or adit. The ore is transported out of the mine in cars, buckets, on conveyor belts, etc. this dataset Surface-Underground Both surface and underground operations are present this dataset Placer A stream-sediment or beach-sand mine. this dataset Offshore Underwater mining operation such as for Mn nodules. this dataset Well The product is extracted through a borehole. Water, oil, and gas are the most common products, but includes solution-mining or in-situ leaching in which liquid solvent is circulated underground to extract the material. this dataset Processing Plant No ore extraction at the site, only a mill, smelter, etc. this dataset Leach Ore or concentrate is placed on an impervious pad, and a solvent is percolated or forced through the heap. The desired mineral or solute is dissolved into the leachate, from which it is more easily refined. this dataset Brine Operation The product, usually a type of salt, produced from a well or open pan. this dataset Geothermal Energy extracted from heat stored in the earth. this dataset Unknown Unknown or undetermined by evaluator this dataset oper_type String 19 0 0 DEP_TYPE Deposit type. General type of deposit or resource present at the site. Textual values of no more than 40 characters. this dataset (no value) Information not available for this record. 269516 records have no value for DEP_TYPE. this dataset dep_type String 40 0 0 PROD_SIZE Production size. A single character value. A broad characterization of the magnitude of production at the site. The precise meanings of this field have changed over time and are lost to history; it is clear in retrospect that two different categorizations were used, a three-fold set based on magnitude (Small, Medium, Large) and a simple indicator (Yes or No), with some records showing U for unknown. Modern specialists would prefer that such a categorization take into account the type of deposit and commodity at the site, but there is no evidence that approach was taken in assigning values to this field. this dataset (no value) Information not available for this record. 194976 records have no value for PROD_SIZE. this dataset Y Yes, production has occurred this dataset N No, production has not occurred this dataset S Small ammount of material produced (we do not know what criteria are used to make this determination) this dataset M Medium ammount of material produced (we do not know what criteria are used to make this determination) this dataset L Large ammount of material produced (we do not know what criteria are used to make this determination) this dataset U Production statistics were not known to the reporters this dataset prod_size String 12 0 0 DEV_STAT Development status. Status of development of the resource or operation. Textual values of no more than 25 characters. this dataset Occurrence Ore mineralization in outcrop, shallow pit or pits, or isolated drill hole. Grade, tonnage, and extent of mineralization essentially unknown. No production has taken place and there has been no or little activity since discovery with the possible exception of routine claim maintenance. this dataset Prospect A deposit that has gone beyond the occurrence stage. That is subsequent work such as surface trenching, adits, or shafts, drill holes, extensive geophysics, geochemistry, and/or geologic mapping has been carried out. Enough work has been done to at least estimate grade and tonnage. The deposits may or may not have undergone feasibility studies that would lead to a decision on going into production. this dataset Producer A mine in production at the time the data was entered. An intermittent producer that produces on demand or seasonally with variable lengths of inactivity is considered a producer. this dataset Past Producer A mine formerly operating that has closed, where the equipment or structures may have been removed or abandoned. this dataset Plant A processing plant (smelter, refiner, beneficiation, etc.) that may or may not be currently producing at the time of data entry. A plant will have no geological information associated with it. this dataset Unknown At the time of data entry, either the development status was unknown or the data source this record came from did not specify this value. this dataset dev_stat String 13 0 0 ORE Ore minerals or materials. Name of the ore mineral or material found in this deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 236479 records have no value for ORE. this dataset ore String 128 0 0 GANGUE Gangue minerals or materials. Name of the gangue mineral or material found in this deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 272740 records have no value for GANGUE. this dataset gangue String 128 0 0 OTHER_MATL Other minerals or materials. Name of other minerals or materials found in this deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 294207 records have no value for OTHER_MATL. this dataset other_matl String 210 0 0 OREBODY_FM Ore body form. Form and shape of the ore body. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 264927 records have no value for OREBODY_FM. this dataset orebody_fm String 60 0 0 WORK_TYPE Workings type. General type of workings at the site. Textual values of no more than 64 characters. this dataset (no value) Information not available for this record. 238249 records have no value for WORK_TYPE. this dataset work_type String 27 0 0 MODEL Mineral deposit model. Mineral deposit models that characterize the site. Multiple models are delimited by braces, with a model number for each. Textual values of no more than 80 characters. this dataset (no value) Information not available for this record. 292387 records have no value for MODEL. this dataset model String 75 0 0 ALTERATION Alteration processes. Geochemical alteration, if any, believed to have been important in forming or modifying the ore materials of a deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 289757 records have no value for ALTERATION. this dataset alteration String 200 0 0 CONC_PROC Concentration processes. Geological processes that are believed to have occurred to concentrate ore materials in the deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 293637 records have no value for CONC_PROC. this dataset conc_proc String 254 0 0 names names String 254 0 0 ORE_CTRL Ore controls. Geologic features, typically structural, that exert control over the form, extent, or character of the deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 279810 records have no value for ORE_CTRL. this dataset ore_ctrl String 200 0 0 REPORTER Reporter. Names of the persons primarily responsible for entering information about the site. Textual values of no more than 224 characters. this dataset (no value) Information not available for this record. 36 records have no value for REPORTER. this dataset reporter String 128 0 0 HROCK_UNIT Host rock unit name. Lithologic and stratigraphic information regarding the host rocks for the ore deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 268180 records have no value for HROCK_UNIT. this dataset hrock_unit String 128 0 0 hrock_type hrock_type String 128 0 0 AROCK_UNIT Associated rock unit name. Lithologic and stratigraphic information regarding the rocks for the ore deposit that are not specifically identified as host ro. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 291593 records have no value for AROCK_UNIT. this dataset arock_unit String 128 0 0 arock_type arock_type String 160 0 0 STRUCTURE Structural characteristics. Description of geological structures at or near the deposit. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 280348 records have no value for STRUCTURE. this dataset structure String 254 0 0 TECTONIC Tectonic setting. Description of tectonic setting within which the deposit is found, includes regional geologic structure. Textual values of no more than 255 characters. this dataset (no value) Information not available for this record. 285058 records have no value for TECTONIC. this dataset tectonic String 96 0 0 REF References. Bibliographic references providing information supporting the database record. Braces delimit multiple references. Textual values of no more than 32768 characters. this dataset (no value) Information not available for this record. 25211 records have no value for REF. this dataset ref String 254 0 0 yfp_ba yfp_ba String 1 0 0 yr_fst_prd yr_fst_prd SmallInteger 2 0 0 ylp_ba ylp_ba String 1 0 0 yr_lst_prd yr_lst_prd SmallInteger 2 0 0 dy_ba dy_ba String 1 0 0 disc_yr disc_yr SmallInteger 2 0 0 prod_yrs prod_yrs String 64 0 0 discr discr String 64 0 0 Peter N Schweitzer USGS Geology, Energy, and Minerals Science Center Geologist mailing address

12201 Sunrise Valley Drive

Reston VA 20192-0002 USA 703-648-6533 703-648-6252 pschweitzer@usgs.gov USGS MRDS This dataset was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Shapefile 1.0 Compact fields: site name, status, commodity abbreviations, and a URL for full information. unzip 10 https://mrdata.usgs.gov/mrds/mrds-trim.zip CSV 1.0 Flattened: 44 most commonly requested fields, multiple values separated by semicolons. unzip 23 https://mrdata.usgs.gov/mrds/mrds-csv.zip CSV Compact fields: site name, status, commodity abbreviations, and a URL for full information. unzip 20 https://mrdata.usgs.gov/mrds/rdbms-tab.zip Tab-delimited text convention, not standardized Comprehensive: all tables and fields unzip 118 https://mrdata.usgs.gov/mrds/rdbms-tab-all.zip OGC WMS 1.3.0 Mineral occurrences, processing plants, and mines https://mrdata.usgs.gov/services/mrds?request=getcapabilities&service=WMS&version=1.3.0& OGC WFS 1.1.0 Mineral occurrences, processing plants, and mines https://mrdata.usgs.gov/wfs/mrds?request=getcapabilities&service=WFS&version=1.0.0& none 20210810 Peter N Schweitzer USGS Geology, Energy, and Minerals Science Center Geologist mailing address

12201 Sunrise Valley Drive

Reston VA 20192-0002 USA 703-648-6533 703-648-6252 pschweitzer@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 Esri ArcGIS 13.0.0.36056 mrds_fUS56 mrds_fUS56 002 Geographic GCS_WGS_1984 Angular Unit: Degree (0.017453) <GeographicCoordinateSystem xsi:type='typens:GeographicCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.0.0'><WKT>GEOGCS[&quot;GCS_WGS_1984&quot;,DATUM[&quot;D_WGS_1984&quot;,SPHEROID[&quot;WGS_1984&quot;,6378137.0,298.257223563]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433],AUTHORITY[&quot;EPSG&quot;,4326]]</WKT><XOrigin>-400</XOrigin><YOrigin>-400</YOrigin><XYScale>1111948722.2222221</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>8.983152841195215e-09</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><LeftLongitude>-180</LeftLongitude><WKID>4326</WKID><LatestWKID>4326</LatestWKID></GeographicCoordinateSystem> 20221128 15175300 20221128 15175300 20250730 14570900 1.0 TRUE File Geodatabase Feature Class dataset EPSG 6.2(3.0.1) 0 20221128